GRASSLANDS PRODUCTIVITY IN THE HYDROGRAPHIC BASIN OF THE ORĂȘTIE RIVER

Abstract

The permanent grasslands from the analysed area are located in the central part of the Orăștiei Corridor and the west of the Șureanu Mountains, from 225 -1,630 m altitude. The coverage with grassy vegetation is 91% and the average number of vascular plants on the vegetal associations is 60. The participation in the grassy carpet of fodder species reaches almost 60% and the harmful ones over 30%. The average pastoral value (PV) is 45 with differences from 60 - 80 for the most valuable associations to 5 - 7 for the degraded ones. The highest green mass production (GMP) of the grasslands was estimated at over 23 t/ha at As. Arrhenatherum elatioris harvested as hay and As. Trifolio repenti - Lolietum with 19 t/ha that has a grazing capacity of 1.6 UVM / ha in a season of 185 days. The worst results are obtained in the economically degraded associations Violo declinatae - Nardetum, Junco - Molinietum, Botriochloetum ischaemi and Clinopodio - Pteridietum aquilini, with 5 -7 PV and 0.4 - 0.8 t/ha GMP